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CVE-2021-38578

Published: Mar 3, 2022Updated: Nov 3, 2025 Sources: CVE List NVD BDU csafCWE-124
7.4HIGH
NVD MITRE
EPSS Score
1.0%
Top 38.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:HPR:HUI:NS:CC:HI:HA:L
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-124CWE-787

Affected Products

Tianocore
oss-projectaka edk2, edk ii
edk2EmbeddedFirmware
Hardware Firmware / bios-uefi
EDK IIEmbeddedFirmware
Hardware Firmware / bios-uefi
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
Сообщество свободного программного обеспечения
oss-projectaka fsf
Debian GNU/LinuxOn-premOS
Operating Systems / linux-distro
insyde
commercial·TWaka insydeh2o
kernelFirmware
Hardware Firmware / bios-uefi
and 1 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-38578?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://bugzilla.tianocore.org/show_bug.cgi?id=3387
bugzilla.tianocore.org
https://edk2.groups.io/g/devel/message/90516
edk2.groups.io
https://github.com/tianocore/edk2/commit/cab1f02565d3b29081dd21afb074f35fdb4e1fd6
github.com
and 20 more references View all →

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